The Turing Protocol by Nick Croydon

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In the midst of World War Two, Enigma codebreaker Alan Turing finds himself on the brink of a discovery that will change the world: a way to send a message back into the recent past.

Published 7 May 2026 (Preorder)
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About the Book…

Humanity’s best kept secret may be its best hope for survival. 

In the midst of World War Two, Enigma codebreaker Alan Turing finds himself on the brink of a discovery that will change the world: a way to send a message back into the recent past. But when his invention successfully averts disaster on D-Day, the danger it poses in the wrong hands becomes terrifyingly clear. As Turing’s enemies close in, only one decision is possible: Nautilus must be kept hidden from the world, safe in the care of the only person he can trust.

Seventy-five years later, Annabelle McIntosh’s life is upended when she learns she will become the latest custodian of the greatest secret of the modern age – Turing’s Nautilus machine. Following in her family’s footsteps, and bound by Turing’s strict principles governing the use of his creation, Annabelle is soon faced with the same impossible choices. Nautilus has the power to prevent catastrophe, but the wrong decision could have devastating consequences.

When the stakes are at their highest, will using the machine save the world – or destroy it?

About the Author…

Nick Croydon was born in Surrey, England, and is the CEO of QBD Books Australia. He has more than twenty-five years’ experience running international publishing companies and book retail businesses across the United Kingdom and Australia. The Turing Protocol is his debut novel. Nick is a father of four and husband to Esther, and he and his family spend their time between Brisbane, Spain and the UK.

Binding

Paperback

Author

ISBN

9781398552180

Page Count

320

Published

7 May 2026

Publisher

Simon & Schuster

Optional Extras

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* Gallery images of our book boxes show an example of what may be included – treat and gift content may differ. If a wax melt bar is included, scent is subject to availability and may differ. If you have any dietary needs or allergies please add a note at checkout.

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